CN108453145B - A kind of magnesium lithium alloy waveguide and preparation method thereof - Google Patents
A kind of magnesium lithium alloy waveguide and preparation method thereof Download PDFInfo
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- CN108453145B CN108453145B CN201810167300.7A CN201810167300A CN108453145B CN 108453145 B CN108453145 B CN 108453145B CN 201810167300 A CN201810167300 A CN 201810167300A CN 108453145 B CN108453145 B CN 108453145B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/06—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of magnesium or alloys based thereon
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
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Abstract
The present invention relates to a kind of magnesium lithium alloy waveguides and preparation method thereof, belong to communication technique field.The production method includes: to be machined out to magnesium lithium alloy casting rod, to remove the pile displacement of magnesium lithium alloy casting rod outer surface；After carrying out pickling, drying process to the magnesium lithium alloy casting rod for eliminating pile displacement, heated；Extrusion forming is carried out to the magnesium lithium alloy casting rod after heating by extruder, obtains magnesium lithium alloy waveguide blank；The magnesium lithium alloy waveguide blank is straightened, sawing and heat treatment, obtains magnesium lithium alloy waveguide.The magnesium lithium alloy waveguide of method preparation provided by the invention complies with the national standard requirements, and yield rate greatly improves the yield rate of magnesium lithium alloy waveguide, reduce production cost up to 78%.
Description
Technical field
The present invention relates to a kind of magnesium lithium alloy waveguides and preparation method thereof, belong to communication technique field.
Background technique
Waveguide is the indispensable component of electromagnetic transmission in field of information communication.It is used primarily in spacecraft, defends
The fields such as star, aircraft, radar, battleship, battlebus.Earliest waveguide is generally Copper alloy material waveguide, then develops into aluminium
Alloy material waveguide.Although copper alloy waveguide and aluminium alloy waveguide tube have reached requirement in electromagnetic signal,
Their quality weight, electric conductivity (electromagnetic wave), electromagnetic wave shielding are not optimal level.Now with space flight, aviation, vehicle-mounted, ship
The development of the technologies such as load, to lightweight, more stringent requirements are proposed, by taking space flight as an example, one gram weight of every mitigation, and propellant
Fuel cost can about save 1000 yuans, therefore need a kind of lighter than copper alloy waveguide, aluminium alloy waveguide tube
Waveguide.
Magnesium lithium alloy weight is lighter than aluminium alloy one third, electromagnetic wave shielding better than copper alloy, aluminium alloy.If utilizing magnesium lithium
Alloy prepares waveguide, and obtained product will have will be light-weight, and electromagnetic shielding performance is good, not by external interference the advantages that.It is existing
Have in technology, make waveguide usually using cold drawing transition method, i.e., seamless circle is first made using perforation pressing method
Copper, aluminium alloy pipe, then minimum 3 mold exchanges such as ovalizing deflection, approximate rectangular deformation, rectangle setting are carried out by cold-drawn machine
Processing program finally obtains waveguide.
The magnesium lithium alloy waveguide pipe range processed using the prior art is more than that 500mm is just bent, and is reached on many products
Less than in national standard straightness and torsion resistance requirement；Cold-drawing process is due to there are inner core head, the frequent quilt of 4 interior angles inside waveguide
Inner core head pulls, burns angle；When the cooperation of interior outer mold is bad, wall unevenness it is even, the degree of eccentricity is unqualified；Cold drawing transition method is produced
Magnesium lithium alloy waveguide yield rate generally below 40%.
Summary of the invention
Present invention mainly solves the problem of be to provide a kind of magnesium lithium alloy waveguide and preparation method thereof, to obtain meeting state
The magnesium lithium alloy waveguide of family's standard, the production method yield rate are 78% or more.
For achieving the above object, the invention provides the following technical scheme:
A kind of production method of magnesium lithium alloy waveguide, comprising the following steps:
Step 1 is machined out magnesium lithium alloy casting rod, to remove the pile displacement of magnesium lithium alloy casting rod outer surface；
Step 2 after carrying out pickling, drying process to the magnesium lithium alloy casting rod for eliminating pile displacement, is heated；
Step 3 carries out extrusion forming to the magnesium lithium alloy casting rod after heating by extruder, obtains magnesium lithium alloy waveguide
Blank；
Step 4 is straightened the magnesium lithium alloy waveguide blank, sawing and heat treatment, and magnesium lithium alloy waveguide is obtained
Pipe.
In an alternative embodiment, amount of machining is 8-12mm in step 1.
In an alternative embodiment, pickling, packet are carried out to the magnesium lithium alloy casting rod for eliminating pile displacement described in step 2
It includes:
The magnesium lithium alloy casting rod for eliminating pile displacement is immersed in pickling solution, at 18-38 DEG C, swings dipping 0.25-
Then 3min is rinsed with water, wherein the pickling solution includes following mass percent component:
CrO310-14%, Fe (NO3)3·9H2O 1-3%, KF0.1-0.3%, HNO30.5-1.5%, surplus H2O。
In an alternative embodiment, heating described in step 2 includes:
At 250-260 DEG C, at least 3h is kept the temperature.
In an alternative embodiment, the magnesium lithium alloy casting rod after heating is squeezed by extruder described in step 3
It is molded, comprising:
First by the extrusion molding dies of steel material at 220-250 DEG C, at least 2h is kept the temperature；
Then at 220-240 DEG C, the magnesium lithium alloy casting rod after heating is squeezed, extrusion ratio 69-83, magnesium lithium closes
The extruded velocity of golden waveguide blank is 0.5-0.8m/min.
In an alternative embodiment, by the magnesium lithium alloy waveguide blank direction of motion blowing along extrusion, make to squeeze
Obtained magnesium lithium alloy waveguide blank is at 220-230 DEG C of temperature, and wind direction and the direction of motion are in 30-60 ° of angle, and air quantity is
1.5-2m3/min。
In an alternative embodiment, alignment described in step 4, comprising: by tension flattening machine with the deformation rate of 1%-3%
It is straightened.
In an alternative embodiment, sawing described in step 4, comprising:
Use diameter for the circular saw of 350-400mm, with the revolving speed of 3200-3700r/min, 1000-6000mm/min
Hydraulic feed speed carries out sawing.
In an alternative embodiment, heat treatment described in step 4, comprising:
At 180-200 DEG C, 1.5-2.5h is kept the temperature.
The magnesium lithium alloy waveguide of above method production.
The present invention has the advantage that
(1) production method of magnesium lithium alloy waveguide provided in an embodiment of the present invention, by removing magnesium lithium alloy casting rod table
The pile displacement in face squeezes the progress pickling of magnesium lithium alloy casting rod and the pre-heat treatment, realization with extruder to magnesium lithium alloy casting rod
Molded, obtaining outer rim tolerance dimension precision is ± (0.04-0.05), and bearing tolerances dimensional accuracy is ± (0.017-
0.03), interior angle≤0.3-0.8 r, outer angle≤0.8-1.2 r, rectangular degree are 900 ± 10 ', and curvature 600mm is no more than
0.25mm, torsion resistance 1000mm are no more than 1.60 magnesium lithium alloy waveguide；This method yield rate is greatlyd improve up to 78%
The yield rate of magnesium lithium alloy waveguide, reduces production cost；
(2) acid washing method provided by the invention can remove the cooling that machining process is attached to magnesium lithium alloy casting rod surface
Lubricating oil or cooling-lubricant avoid corrosion when these residual oil liquid enter extrusion cylinder with alloy bar in the subsequent process and squeeze
Pressure cylinder generates loose and stomata when into extrusion die cavity in moulding material；Simultaneously in metal bar surface shape and internal shape
The defects of at being mingled with, avoid alloy bar exposed standing time it is too long when lead to surface corrosion；
(3) by control extrusion ratio and rate of extrusion, magnesium is avoided while guaranteeing that magnesium lithium alloy waveguide smoothly squeezes out
Lithium alloy wave guide wall is damaged or distorts, it is ensured that obtains satisfactory waveguide, further improves yield rate, reduces
Production cost；
(4) by drying along the magnesium lithium alloy waveguide blank direction of motion, make to squeeze obtained magnesium lithium alloy waveguide
The temperature of blank enables blank to quench (solid solution), to generate hardening constituent, the mechanics for enhancing waveguide is strong at 220-230 DEG C
Degree, when wind direction and the direction of motion are in 30-60 ° of angle, air quantity 1.5-2m3When/min, ensuring the quenching of waveguide blank
Under the premise of avoid because wind direction and/or air quantity it is improper caused by waveguide surface recess or buckling problem.
Detailed description of the invention
Fig. 1 is the rectangle magnesium lithium alloy waveguide structure schematic diagram that the embodiment of the present invention 1 provides；
Fig. 2 is the flat rectangle magnesium lithium alloy waveguide structure schematic diagram that the embodiment of the present invention 2 provides；
Fig. 3 is the horizontal wing ridge abnormity magnesium lithium alloy waveguide structure schematic diagram that the embodiment of the present invention 3 provides；
Fig. 4 is the wing ridge abnormity magnesium lithium alloy waveguide structure schematic diagram of dislocation up and down that the embodiment of the present invention 4 provides；
Fig. 5 is the interior convex ridge abnormity magnesium lithium alloy waveguide structure schematic diagram that the embodiment of the present invention 5 provides；
Fig. 6 is the outer recessed ridge abnormity magnesium lithium alloy waveguide structure schematic diagram that the embodiment of the present invention 6 provides.
Specific embodiment
To facilitate the understanding of the present invention, below in conjunction with Figure of description and specific embodiment to the present invention make more comprehensively,
It meticulously describes, but these embodiments are not construed as being limitation of the present invention, the tool of embodiment offer is provided
Concrete conditions in the establishment of a specific crime, parameter or numerical value could implement the present invention.The method is conventional method unless otherwise instructed, the material for example without
Special instruction can be obtained from public commercial source.
The embodiment of the invention provides a kind of production methods of magnesium lithium alloy waveguide, comprising the following steps:
Step 1 is machined out magnesium lithium alloy casting rod, to remove the pile displacement of magnesium lithium alloy casting rod outer surface；
Specifically, in the embodiment of the present invention, the preferred φ 90-100mm casting rod of magnesium lithium alloy casting rod, the preferred 8- of amount of machining
12mm, such as magnesium lithium alloy casting rod are φ 98mm casting rod, and machine dosage is 8mm, and machine obtains φ 90mm casting rod after adding；Pass through machining
It can be to avoid because of defect caused by being mingled with pile displacement, passing through the dimensional tolerance for controlling the casting rod that cutting output makes in final products
Precision reaches ± 1.0mm or so；
Magnesium lithium alloy casting rod used in the embodiment of the present invention meets National Standard of the People's Republic of China GB/T5153-2003
" deformed Mg and magnesium alloy row number and chemical component ", GB/T33141-2016 " magnesium lithium alloy ingot casting ".I.e.: Li 9.2~9.8,
Al 0.8~1.5, Cd≤0.001, Se≤0.001, Fe+Cu 0.002~0.004, Mg surplus；
Step 2 after carrying out pickling, drying process to the magnesium lithium alloy casting rod for eliminating pile displacement, is heated；
In the embodiment of the present invention, preferably the magnesium lithium alloy casting rod for eliminating pile displacement is immersed in pickling solution, in 18-38
At DEG C, dipping 0.25-3min is swung, is then rinsed with water, wherein the pickling solution includes following mass percent component:
CrO310-14%, Fe (NO3)3·9H2O 1-3%, KF0.1-0.3%, HNO30.5-1.5%, surplus H2O；
The acid washing method can remove cutting oil or the cooling that machining process is attached to magnesium lithium alloy casting rod surface
Lubricating fluid avoids these residual oil liquid and corrodes extrusion cylinder when entering extrusion cylinder with alloy bar in the subsequent process, into squeezing
Loose and stomata is generated when compression mould cavity in moulding material；Chemical oxide film can also be formed on metal bar surface simultaneously, kept away
Exempt to lead to surface corrosion when alloy bar exposed standing time is too long；
In the embodiment of the present invention, preferably at 250-260 DEG C, heat preservation at least 3h casts the magnesium lithium alloy for eliminating pile displacement
Stick is heated；
Step 3 carries out extrusion forming to the magnesium lithium alloy casting rod after heating by extruder, obtains magnesium lithium alloy waveguide
Blank；
Specifically, in the embodiment of the present invention, extruder upper mold is first given, is then used in the magnesium lithium alloy after air stove heating
Casting rod carries out extrusion forming；Extrusion die preferred steel material plane distribution composite die tool in the embodiment of the present invention, including upper mold and
Lower die, preferably 25-36 ° of shunt bridge gradient (soldering angle), the preferred 2.5-3.5mm of bridge bottom fillet R, bonding container are highly preferred in upper mold
25-35mm, tap hole preferably 4 holes；
When First Extrusion forms, extruding force is determined by following formula (1):
P=BAsδplnλ+μδpπ(D+d) (1)
In formula:
P is extruding force, MPa；
As is extrusion cylinder or squeezing needle area, cm2；
δpFor resistance of deformation related with deformation velocity and temperature, MPa, for magnesium lithium alloy, δ p is taken at 250 DEG C or so
Value is 36-47MPa；
λ is extrusion coefficient, is the ratio of the basal area of extrusion cylinder area and extruded product；
μ is
D is extrusion cylinder diameter, cm；
L is magnesium lithium alloy casting rod length, cm；
D is squeezing needle diameter, cm；
B is correction factor, value 1.3-1.5, and hard alloy removes the limit 1.3, mild alloy capping 1.5.
The sectional area as needed for magnesium lithium alloy waveguide, length requirement difference (minimum sectional area 4.0mm2；Maximum secting area
< 200mm2；Maximum length 2100mm), in subsequent technique, in sectional area difference, extruding force is determined using formula (2):
P=BAsδplnλ (2)；
In a preferred embodiment, first by the extrusion molding dies of steel material at 220-250 DEG C, at least 2h is kept the temperature, so
After be assembled on extruder mold rack, be no more than 2.5min in enter squeeze program；In squeezing program, in 220-240
At DEG C, the magnesium lithium alloy casting rod after heating is squeezed, extrusion ratio 69-83, the extrusion speed of magnesium lithium alloy waveguide blank
Degree is 0.5-0.8m/min.Through control extrusion ratio and rate of extrusion, while guaranteeing that magnesium lithium alloy waveguide smoothly squeezes out
Avoid magnesium lithium alloy wave guide wall damaged or distortion, it is ensured that obtain satisfactory waveguide, further improve yield rate,
Reduce production cost.
Further, by drying along the magnesium lithium alloy waveguide blank direction of motion, make to squeeze obtained magnesium lithium alloy
The temperature of waveguide blank enables blank quenching (solid solution) to enhance waveguide to generate hardening constituent at 220-230 DEG C
Mechanical strength, when wind direction and the direction of motion are in 30-60 ° of angle, air quantity 1.5-2m3When/min, ensuring waveguide blank
Avoided under the premise of quenching because wind direction and/or air quantity it is improper caused by waveguide surface recess or buckling problem；
Step 4 is straightened the magnesium lithium alloy waveguide blank, sawing and heat treatment, and magnesium lithium alloy waveguide is obtained
Pipe.
In the embodiment of the present invention, preferably it is straightened by tension flattening machine with 1% -3% deformation rate, magnesium lithium can be made
The longitudinal shape of alloy waveguide elimination is not whole, can also reduce its internal residual stress, improves intensity and simultaneously keeps it good
Contoured surface；
The sawing includes: the high speed circular saw for using diameter as 350-400mm, with turning for 3200-3700r/min
Speed, the hydraulic feed speed of 1000-6000mm/min carry out sawing, to ensure the type face precision of product；
The heat treatment includes: to keep the temperature 1.5-2.5h at 180-200 DEG C, so that the metal after solid solution (quenching) is strong
Change phase, is uniformly diffused into each metal lattice in the regular hour at a certain temperature, plays the role of reinforced metal.
The production method of magnesium lithium alloy waveguide provided in an embodiment of the present invention passes through removal magnesium lithium alloy casting rod surface
Pile displacement carries out pickling the pre-heat treatment to magnesium lithium alloy casting rod, and realization carries out extrusion forming to magnesium lithium alloy casting rod with extruder,
Obtaining outer rim tolerance dimension precision is ± (0.04-0.05), and bearing tolerances dimensional accuracy is ± (0.017-0.03), the interior angle r
≤ 0.3-0.8, outer angle≤0.8-1.2 r, rectangular degree is 90 ° ± 10 ', and curvature 600mm is no more than 0.25mm, torsion resistance
1000mm is no more than 1.6 ° of magnesium lithium alloy waveguide；This method yield rate greatly improves magnesium lithium alloy wave up to 78%
The yield rate of conduit, reduces production cost.
The embodiment of the invention also provides the magnesium lithium alloy waveguides of above method production.The wave guide cross-section can be
Hollow rectangle column structure, hollow flat rectangular cylindrical structures, special-shaped hollow structure etc., the present invention is without limitation.
The following are several specific embodiments of the invention:
Embodiment 1
The production method for present embodiments providing a kind of magnesium lithium alloy waveguide, comprising the following steps:
Step 1 is machined out φ 98mm magnesium lithium alloy casting rod, processing capacity 8mm, to remove the magnesium lithium alloy casting
The pile displacement of stick outer surface obtains φ 90mm magnesium lithium alloy casting rod；
Step 2 immerses φ 90mm magnesium lithium alloy casting rod in pickling solution, at 20 DEG C, swings dipping 1min, then uses
Water rinsing, drying, obtains the 90 magnesium lithium alloy casting rod of φ of surface cleaning, and the pickling solution includes following mass percent group
Point: CrO312%, Fe (NO3)3·9H2O2%, KF0.3%, HNO31% and surplus be water；By the φ 90mm magnesium lithium of surface cleaning
Alloy casting rod is put into air electric furnace, is heated to 250 DEG C (metal temperatures), and 3h is kept the temperature；
Step 3 carries out the 90 magnesium lithium alloy casting rod of φ after heating by domestic computer-controlled 650 tons of bright bright extruders
Extrusion forming obtains magnesium lithium alloy waveguide blank:
Extruder upper mold: extrusion die outer dimension is 149 × 220mm of φ, steel H13, shunts combination for plane
Mold, extrusion die include upper die and lower die, and shunt bridge gradient (soldering angle) is 36 °, bridge bottom fillet R=3.5mm, welds in upper mold
Conjunction room height is 35mm, tap hole is 4 holes；Mold is heated to 250 DEG C (metal temperatures), heat preservation 2.5h descendant in air furnace
Work is taken out, and is attached on extrusion die rack, enters in 2.5min and squeezes program；
Extrusion forming: extruding barrel dliameter is φ 92mm, heating temperature is 230 DEG C, soaking time 5h, and master cylinder pressure is
188.6bar, breakthrough point pressure are 221bar, and extrusion ratio 69~83, (speed is magnesium lithium alloy waveguide to extruded product muzzle velocity
The extruded velocity of pipe blank) it is 0.5-0.8m/min；When magnesium lithium alloy waveguide blank comes out from extruder outlet, use
It is 8 Fans of overhung, dries along the waveguide blank direction of motion, wind direction and the direction of motion is in 45° angle, total blast volume
For 1.8m3/ min guarantees that the temperature of the magnesium lithium alloy waveguide blank of outlet is 230 DEG C.
Step 4 is straightened the magnesium lithium alloy waveguide blank, sawing and heat treatment, and finished product magnesium lithium alloy is obtained
Waveguide:
Alignment: it is straightened by the tension flattening machine of 150KN with 1% -3% deformation rate；
Sawing: using the circular saw that diameter is 600mm for 380mm, with a thickness of 3mm, stroke, with the revolving speed of 3500r/min,
The hydraulic feed speed of 3000mm/min carries out sawing, obtains multiple waveguides of equidimension；
Heat treatment: using 3 tons of domestic Suzhou, newly long light air electric furnace is heat-treated the product that sawing obtains, heat treatment
When, with 1.5h from room temperature to 180 DEG C, then in 180 DEG C of heat preservation 2.5h.
Magnesium lithium alloy waveguide provided in this embodiment is as shown in Figure 1, the waveguide is uniform in material, the high (inner section of precision
Wide 28.50 ± the 0.05mm of size, inner section size high 12.62 ± 0.05mm, interior angle r1≤0.8；Outer cross section size is wide by 31.75 ±
0.057mm, outer cross section size high 15.88 ± 0.057mm, exterior angle r2≤1.2)；Main mould electromagnetic signal frequency fLFor 6.57GHz, fH
For 9.99GHZ。
Embodiment 2
A kind of magnesium lithium alloy waveguide is present embodiments provided, preparation method is substantially the same manner as Example 1, unique different
Be in upper mold shunt bridge gradient be 35 °, bridge bottom fillet R=3.4mm, bonding container height 33mm；
Magnesium lithium alloy waveguide provided in this embodiment is as shown in Fig. 2, the waveguide is uniform in material, the high (inner section of precision
Wide 28.50 ± the 0.028mm of size, inner section size high 5.0 ± 0.028mm, interior angle r1≤0.8；Outer cross section size is wide by 31.75 ±
0.057mm, outer cross section size high 8.25 ± 0.057mm, exterior angle r2≤1.2)；Main mould electromagnetic signal frequency fLFor 7.2GHz, fHFor
11.5GHZ.
Embodiment 3
A kind of magnesium lithium alloy waveguide is present embodiments provided, preparation method is substantially the same manner as Example 1, unique different
Be for enable horizontal wing muscle metal just it is good from mold cavity flow out forming, upper mold shunt bridge gradient be 32 °, bridge bottom fillet R
=2.8mm, bonding container height are 28mm；
Magnesium lithium alloy waveguide provided in this embodiment is as shown in figure 3, the waveguide is uniform in material, the high (inner section of precision
Wide 10.16 ± the 0.03mm of size, inner section size high 22.86 ± 0.03mm, interior angle r1≤0.6；Outer cross section size is wide by 12.16 ±
0.04mm, outer cross section size high 24.86 ± 0.04mm, exterior angle r2≤0.8；The horizontal wide 7mm of wing muscle × thickness 3mm)；Main mould electromagnetism letter
Number frequency fLFor 8.2GHz, fHFor 12.5GHZ；Waveguide provided in this embodiment, which has, simultaneously is symmetricly set on hollow rectangle column
The horizontal wing muscle of two of two sides, improves flatness installation quality, solves electromagnetism and holds back stream.
Embodiment 4
A kind of magnesium lithium alloy waveguide is present embodiments provided, preparation method is substantially the same manner as Example 1, unique different
Be for enable the wing muscle to misplace up and down preferably from mold cavity flow out forming, upper mold shunt bridge gradient be 30 °, bridge bottom fillet
R=3.0mm, bonding container height are 30mm；
Magnesium lithium alloy waveguide provided in this embodiment is as shown in figure 4, the waveguide is uniform in material, the high (inner section of precision
Wide 22.86 ± the 0.03mm of size, inner section size high 5.0 ± 0.03mm, interior angle r1≤0.5；Outer cross section size is wide by 25.40 ±
0.04mm, outer cross section size high 7.54 ± 0.04mm, exterior angle r2≤0.8；About the two wide 7mm of dislocation wing muscle × thickness 3mm)；It is main
Mould electromagnetic signal frequency fLFor 8.2GHz, fHFor 12.5GHz；Waveguide provided in this embodiment has and shifts to install in sky simultaneously
The horizontal wing muscle of two of heart rectangular column two sides, further improves flatness installation quality, preferably eliminates electromagnetism and holds back stream.
Embodiment 5
A kind of magnesium lithium alloy waveguide is present embodiments provided, preparation method is substantially the same manner as Example 1, unique different
Be for enable single ridge of inner hole protrusions preferably from mold cavity flow out molding, upper mold shunt bridge gradient be 28 °, bridge bottom circle
Angle R=2.7mm, bonding container height are 27mm；
Magnesium lithium alloy waveguide provided in this embodiment is as shown in figure 5, the waveguide is uniform in material, the high (inner section of precision
Wide 28.0 ± the 0.05mm of size, inner section size high 7.56 ± 0.05mm, interior angle r1≤0.5；Outer cross section size is wide by 31.0 ±
0.05mm, outer cross section size high 15.1 ± 0.05mm, exterior angle r2≤0.8；The high 7mm of single ridge of inner hole protrusions × thickness 3mm)；It is main
Mould electromagnetic signal frequency fLFor 3.961GHz, fHFor 11.705GHz；Protrusion single ridge can mean allocation electromagnetic wave flow direction, again
Improve tear resistance when its bending.
Embodiment 6
A kind of magnesium lithium alloy waveguide is present embodiments provided, preparation method is substantially the same manner as Example 1, unique different
Be for enable in inner hole be recessed single ridge preferably from mold cavity flow out molding, upper mold shunt bridge gradient be 27 °, bridge bottom circle
Angle R=2.6mm, bonding container height are 26mm；
Magnesium lithium alloy waveguide provided in this embodiment is as shown in fig. 6, the waveguide is uniform in material, the high (inner section of precision
Wide 28.0 ± the 0.05mm of size, inner section size high 12.6 ± 0.05mm, interior angle r1≤0.5；Outer cross section size is wide by 31.0 ±
0.05mm, outer cross section size high 15.1 ± 0.05mm, exterior angle r2≤0.8；The single ridge depth 7mm × thickness 3mm being recessed in inner hole；Main mould
Electromagnetic signal frequency fLFor 3.9GHz, fHFor 11.7GHz；Recessed single ridge can mean allocation electromagnetic wave flow direction, and improve
Tear resistance when it is bent.
The waveguide that various embodiments of the present invention provide meets following requirements of the national standard: GB/T11450.1-1989 is " empty
Heart metal waveguide first part: general requirement and measurement method ", GB/T11450.2-1989 " hollow metal waveguide second part:
The related specification of normal rectangular waveguide ", " hollow metal waveguide Part VI: medium flat rectangular waveguide has GB/T11450.5-1989
Close specification ".
The above, optimal specific embodiment only of the invention, but scope of protection of the present invention is not limited thereto,
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the protection scope of the present invention.
The content that description in the present invention is not described in detail belongs to the well-known technique of professional and technical personnel in the field.
Claims (8)
1. a kind of production method of magnesium lithium alloy waveguide, which comprises the following steps:
Step 1 is machined out magnesium lithium alloy casting rod, to remove the pile displacement of magnesium lithium alloy casting rod outer surface；
Step 2 after carrying out pickling, drying process to the magnesium lithium alloy casting rod for eliminating pile displacement, is heated；
Step 3, first by the extrusion molding dies of steel material at 220-250 DEG C, keep the temperature at least 2h；Then at 220-240 DEG C,
Magnesium lithium alloy casting rod after heating is squeezed, extrusion ratio 69-83, the extruded velocity of magnesium lithium alloy waveguide blank is
0.5-0.8m/min obtains magnesium lithium alloy waveguide blank, passes through the magnesium lithium alloy waveguide blank direction of motion along extrusion
Blowing makes to squeeze obtained magnesium lithium alloy waveguide blank at 220-230 DEG C of temperature, and wind direction and the direction of motion are in 30-60 °
Angle, air quantity 1.5-2m3/min；
Step 4 is straightened the magnesium lithium alloy waveguide blank, sawing and heat treatment, and magnesium lithium alloy waveguide is obtained.
2. the production method of magnesium lithium alloy waveguide according to claim 1, which is characterized in that amount of machining in step 1
For 8-12mm.
3. the production method of magnesium lithium alloy waveguide according to claim 1, which is characterized in that described in step 2 pair
The magnesium lithium alloy casting rod for eliminating pile displacement carries out pickling, comprising:
The magnesium lithium alloy casting rod for eliminating pile displacement is immersed in pickling solution, at 18-38 DEG C, swings dipping 0.25-3min,
Then it is rinsed with water, wherein the pickling solution includes following mass percent component:
CrO310-14%, Fe (NO3)3·9H2O 1-3%, KF0.1-0.3%, HNO30.5-1.5%, surplus H2O。
4. the production method of magnesium lithium alloy waveguide according to claim 1, which is characterized in that add described in step 2
Heat includes:
At 250-260 DEG C, at least 3h is kept the temperature.
5. the production method of magnesium lithium alloy waveguide according to claim 1, which is characterized in that alignment described in step 4,
It include: to be straightened by tension flattening machine with the deformation rate of 1%-3%.
6. the production method of magnesium lithium alloy waveguide according to claim 1, which is characterized in that sawing described in step 4,
Include:
Use diameter for the circular saw of 350-400mm, with the revolving speed of 3200-3700r/min, 1000-6000mm/min it is hydraulic
Feed speed carries out sawing.
7. the production method of magnesium lithium alloy waveguide according to claim 1, which is characterized in that at heat described in step 4
Reason, comprising:
At 180-200 DEG C, 1.5-2.5h is kept the temperature.
8. the magnesium lithium alloy waveguide made by the production method of the described in any item magnesium lithium alloy waveguides of claim 1-7.
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| CN101037743A (en) * | 2007-05-09 | 2007-09-19 | 东北轻合金有限责任公司 | High-accuracy aluminum alloy wave canal and manufacturing method thereof |
| CN102284547A (en) * | 2011-06-23 | 2011-12-21 | 重庆大学 | Method for processing rectangular aluminum alloy waveguide through multi-pass rolling drawing |
| CN102810703A (en) * | 2011-06-03 | 2012-12-05 | 王子毅 | Rectangular, flat rectangular and special-shaped magnesium alloy waveguide tubes |
| CN105750348A (en) * | 2014-12-15 | 2016-07-13 | 北京有色金属研究总院 | Processing method of magnesium lithium alloy hollow section bars |
| CN107511402A (en) * | 2017-07-14 | 2017-12-26 | 中电科微波通信（上海）股份有限公司 | A kind of rectangular waveguide |
Family Cites Families (1)
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| CN103474549B (en) * | 2012-06-07 | 2016-12-14 | 清华大学 | Semiconductor structure |
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| CN101037743A (en) * | 2007-05-09 | 2007-09-19 | 东北轻合金有限责任公司 | High-accuracy aluminum alloy wave canal and manufacturing method thereof |
| CN102810703A (en) * | 2011-06-03 | 2012-12-05 | 王子毅 | Rectangular, flat rectangular and special-shaped magnesium alloy waveguide tubes |
| CN102284547A (en) * | 2011-06-23 | 2011-12-21 | 重庆大学 | Method for processing rectangular aluminum alloy waveguide through multi-pass rolling drawing |
| CN105750348A (en) * | 2014-12-15 | 2016-07-13 | 北京有色金属研究总院 | Processing method of magnesium lithium alloy hollow section bars |
| CN107511402A (en) * | 2017-07-14 | 2017-12-26 | 中电科微波通信（上海）股份有限公司 | A kind of rectangular waveguide |
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